RT Journal Article SR Electronic T1 Still puzzling about a clear definition of pulmonary arterial hypertension in newborns JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1900005 DO 10.1183/13993003.00005-2019 VO 53 IS 3 A1 Giuseppe Calcaterra A1 Vassilios Fanos A1 Pier Paolo Bassareo YR 2019 UL http://erj.ersjournals.com/content/53/3/1900005.abstract AB